A-level ENGLISH LITERATURE B 7717/1A Paper 1A Literary genres: Aspects of tragedy

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GCSE
CHEMISTRY
Higher Tier Paper 2
H
Tuesday 11 June 2024 Morning Time allowed: 1 hour 45 minutes
Materials
For this paper you must have: For Examiner’s Use
• a ruler
• a scientific calculator Question Mark
• the periodic table (enclosed). 1
2
Instructions
• Use black ink or black ball-point pen. 3
• Pencil should only be used for drawing. 4
• Fill in the boxes at the top of this page.
5
• Answer all questions in the spaces provided. Do not write outside
the box around each page or on blank pages. 6
• If you need extra space for your answer(s), use the lined pages at the end of 7
this book. Write the question number against your answer(s). 8
• Do all rough work in this book. Cross through any work you do not want
to be marked. 9

TOTAL
Information
• The maximum mark for this paper is 100.
• The marks for questions are shown in brackets.
• You are expected to use a calculator where appropriate.
• In all calculations, show clearly how you work out your answer.
• You are reminded of the need for good English and clear presentation
in your answers.




*JUN2484622H01*
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, 2
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outside the
0 1 A student investigated an aqueous solution of a salt. box




The student identified that the salt solution contained only sodium ions and chloride
ions.


0 1 . 1 Describe a test to identify sodium ions.

Give the result of the test.
[2 marks]

Test for sodium ions



Result




0 1 . 2 Describe a test to identify chloride ions.

Give the result of the test.
[2 marks]

Test for chloride ions



Result




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IB/M/Jun24/8462/2H

, 3
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outside the
The student determined the concentration of sodium chloride in the salt solution. box


This is the method used.

1. Weigh an empty evaporating dish.
2. Add 25.0 cm3 of the salt solution into the evaporating dish.
3. Heat the evaporating dish and contents.
4. Weigh the evaporating dish and contents.
5. Repeat steps 3 to 4 until there is no further change in mass.
6. Repeat steps 1 to 5 three more times.



0 1 . 3 Why did the student heat the evaporating dish and contents until the mass did not
change?
[1 mark]




0 1 . 4 How did the student calculate the mass of solid sodium chloride remaining after steps
1 to 5?
[1 mark]
Tick () one box.


Mass of 25 cm3 of salt solution + mass of empty evaporating dish


Mass of 25 cm3 of salt solution − mass of empty evaporating dish

Mass of evaporating dish and dry contents + mass of empty
evaporating dish

Mass of evaporating dish and dry contents − mass of empty
evaporating dish




Question 1 continues on the next page




Turn over ►


*03*
IB/M/Jun24/8462/2H

, 4
Do not write
outside the
0 1 . 5 The student calculated the concentration of sodium chloride in the salt solution. box




Table 1 shows the results.


Table 1


Concentration of sodium chloride in g/dm3

Trial 1 Trial 2 Trial 3 Trial 4

35.2 34.6 36.4 33.8




The percentage by mass of sodium ions in sodium chloride is 39.3%.

Calculate the mean concentration of sodium ions in the salt solution.
[4 marks]




Mean concentration = g/dm3 10




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IB/M/Jun24/8462/2H